Abstract: A media content aggregation system retrieves media content from a user's device or off-device media server and services accessible by the user and organizes the retrieved media content into a media content list. A user can filter and/or select various content items from the media content list and store the selected items in a media collection. The aggregation system is configured to parse and optimize the content items for completeness and optimal display on specified devices in addition to optimizing the media content list for display. The user can select the content items from this list with one click before assembling a collection. The media content aggregation system is configured to handle and store authentication information from the media server or services to obtain access to their media content and communicates a media content application that provides a user interface to a user on a client device.